Make Font Awesome icons in a circle?

With Font Awesome you can easily use stacked icons like this:

<span class="fa-stack fa-2x">
  <i class="fas fa-circle-thin fa-stack-2x"></i>
  <i class="fas fa-lock fa-stack-1x fa-inverse"></i>
</span>

refer Font Awesome Stacked Icons

Update:- Fiddle for stacked icons

i.fa {
  display: inline-block;
  border-radius: 60px;
  box-shadow: 0 0 2px #888;
  padding: 0.5em 0.6em;

}

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<i class="fa fa-wrench"></i>